Zen Logic's ZL-SMBK is a power bank and Bluetooth speaker set that comes in 6 fun and expressive colors, features a charging cable and two adjustable wrist straps so you can bring your music and charging power on the go with you. The portable Bluetooth speaker has a 30' foot wireless range and a speakerphone feature for you convenience. The power bank can either charge your speaker or any of your other compatible devices.